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Last Updated: 10/05/2023

Setting boundaries: Cohesin and mutually exclusive expression of virulence genes in the human malaria parasite – PlasmoVarOrg

Objectives

The proposed project will use fluorescence microscopy, genome-wide approaches, and proteomics to provide an in-depth functional characterization of cohesin and explore how it functions in the organization and transcription of the var gene family, which impacts the virulence of the parasite.

Principal Institution

Institut Pasteur, France

Principal Investigators / Focal Persons

Jessica Bryant

Rationale and Abstract

Mutually exclusive expression of the var gene family is critical for infection and immune evasion by the deadliest human malaria parasite, Plasmodium falciparum. All but one var gene are silenced in heterochromatic clusters at the nuclear periphery, and activation is associated with spatial separation from this repressive cluster. Until now, the factors facilitating genome organization in P. falciparum were unknown; however, the researchers recently found cohesin complex components enriched in var gene chromatin by mass spectrometry. Genome-wide analysis of a cohesin subunit revealed two peaks flanking a single var gene locus, suggesting a role in DNA looping or chromatin domain formation at the active var gene.

Thematic Categories

Genetics and Genomics

Date

Jan 2022 — Jan 2025

Total Project Funding

$355,942

Funding Details
National Research Agency (ANR) France, France

Project number: ANR-21-CE15-0010
€324,386
Project Site

France

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